18 Inch BMX Bikes – The Perfect In-Between Size for Kids & Teens
18-inch BMX bikes are the ideal choice for kids and young teens with a height of approximately 125 to 145 cm (4'1" to 4'9"). They perfectly bridge the gap between 16" and 20" models, offering a particularly agile, child-friendly riding experience – ideal for the next development stage in BMX sports.
At KHEbikes®, you’ll find lightweight freestyle BMX bikes with durable components and kid-optimised geometry – perfect for the park, street, or your first pump track session. In 2025, we became the first brand worldwide to launch a true 18-inch BMX with a freecoaster hub – naturally including our patented AFFIX rotor for 360-degree barspins.
Models equipped with a freecoaster hub are perfect for rollbacks without pedal movement – ideal for young riders looking for top performance. Depending on the model, high-quality Kenda or KHE ACME BMX tyres are used.
Frequently Asked Questions about 18-inch BMX Bikes
What age is an 18-inch BMX suitable for?
Usually for children from around 7 years old, with a height of approx. 125 to 145 cm (4'1" to 4'9").
What’s the advantage over a 16-inch BMX?
More stability, higher speed, and extra space – ideal for taller kids who already feel confident on the bike.
What does the AFFIX rotor do?
With the patented AFFIX system, 360-degree barspins are possible – without twisted brake cables. Safe, lightweight and perfect for tricks.
When should you move to a 20-inch BMX?
From approx. 140 cm (4'7"), a 20-inch BMX bike is a great next step. However, 18-inch models can still be used comfortably up to a height of 150 cm (4'11").
How much does an 18-inch KHE BMX weigh?
Our 18-inch models weigh between 8.8 kg and 10.1 kg (19.4–22.3 lbs) – perfect for control, acceleration and tricks.
Tips for Parents & Young Riders
A good 18-inch BMX should be stable, lightweight, and have geometry that suits your child's riding style. Look for child-friendly grips, ergonomic saddles and easy-to-use brakes. Our models offer high-quality features and smart details – ready to ride.
Safety comes first: helmets & gloves are essential. Cool accessories like pegs, stickers, or seat upgrades make the bike truly unique.
By the way: if you want to start learning tricks, check out our KHE Beginner Trick Videos – ideal for young starters.
Why BMX is the Best Choice for Driven Kids
BMX makes kids confident, agile, and motivated. The active handling builds balance, coordination, and fun through movement – whether it’s on the driveway, skatepark, or pump track.
With over 35 years of experience as Germany’s first BMX brand, we at KHEbikes know exactly what counts when it comes to kids’ bikes. You benefit from thoughtful design, free returns, and genuine manufacturer support.
Discover your 18-inch BMX now – with experience, innovation, and KHEbikes® style!